Global Patent Index - EP 2267587 A2

EP 2267587 A2 2010-12-29 - Capacitive -inductive touch screen

Title (en)

Capacitive -inductive touch screen

Title (de)

Kapazitiv-induktiver Berührungsbildschirm

Title (fr)

Écran tactile capacitif/inductif

Publication

EP 2267587 A2 (EN)

Application

EP 10165163 A

Priority

US 49199009 A

Abstract (en)

A touch screen uses a combination of capacitive sensing and inductive sensing applied to the same sensor pattern. A capacitive sensor uses the electric field formed by the columns and rows of the sensor matrix. An inductive sensor uses the magnetic field formed by current flowing in column and row lines to induce an inductive pen. Using the same sensor lines, the magnetic field created by the oscillating inductive pen is detected. Both methods require no moving elements in the sensor and it is possible to combine both method of detections in the same sensor pattern. Using switch matrices, the sensor lines are operated in an open loop fashion for the capacitive detection mode, and are operated in a closed loop fashion for the inductive detection mode.

IPC 8 full level

G06F 3/044 (2006.01); G06F 3/046 (2006.01)

CPC

G06F 3/044 (2013.01); G06F 3/046 (2013.01)

Citation (applicant)

None

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

Designated extension state (EPC)

BA ME RS

DOCDB simple family

EP 2267587 A2 20101229; EP 2267587 A3 20140416; CN 101937296 A 20110105; CN 101937296 B 20130123; US 2010328249 A1 20101230